The past years there was heavy research going on concerning the topic of the 6502/6510 extended instruction set.
The usage of the extra instructions increased more and more in recent demos because it became more clear how they work and good documentation has been established.
This competition should now encourage the community to explicitely think about new applications and making them public.

This event has been rised before, but there was heavy discussion about the rules and so i try a second time.

These are the new rulez:

The Demo must
- make heavy use of NMOS6510 unintended opcodes and gain profit from the extended instruction set within the main effect
- emphasize on coding and the main effect
- be onescreen and onefile
- include the credits and reference to csdb and this compo
- be runable on a stock c64.
- be startable with the "run" command
- be open source with the source beeing uploaded to CSDB (ascii format).
Not every opcode should be documented but the essential parts are needed to.
- add explanation of where, how and for what the UOCs have been used and what advantage you get over normal ops.

The demo may
- also use other elements like sprites/grafics/charset if they are necessary to present the main effect
(for example: you may use grafics data in textures or sprite data for a sprite multiplexer or samples for a
new digi routine...)
- as this is a coding compo: If you still want to use more elements (like a logo) you have to do some coding with them
(for example: a logo swinger would be allowed but a static logo not)
- play an accompanying tune (if your main effect is not inherently related to sound output). However it should be
one speed and should not use samples.
- use material from some CSDB competition before, preferably which is unused else.
- show a simple text screen (without any other elements) with explanation directly after run from which you turn to the main part using space.
Additional information which does not fit on a single textscreen can be supported in a readme.txt or using the CSDB.

Timeline:
The Challenge starts directly after the entry is created. It ends with the end of the year.

Disclaimer:
There will be no jury. This is a fun compo and there should be fun!
Every submission will be judged by the CSDB voting system alone.
Everybody here has a feeling about the quality of a C64 production and up/downvotes will not disturb that feeling in my opinion and therefore are of no use (and should not be performed)!
Of course the content must conform to social standards in that it does not contain unethical stuff such as propaganda of violence, sexism, racism.
Additionally it is not allowed to use copyrighted stuff. No releases will be taken out, if they have been submitted, in trust no one will misuse the competition for unethical behaviour.
If your submission does not conform to the rules you may not wonder about getting heavily disliked by the community. ;-)

About this site:
CSDb (Commodore 64 Scene Database) is a website which goal is to gather as much information and material about the scene
around the commodore 64 computer - the worlds most popular home computer throughout time. Here you can find almost anything which was ever made
for the commodore 64, and more is being added every day. As this website is scene related, you can mostly find demos, music and graphics made by the
people who made the scene (the sceners), but you can also find a lot of the old classic games here.
Try out the search box in the top right corner, or check out the CSDb main page for the latest additions.